Vessel sealing system using capacitive rf dielectric heating

Details Vessel sealing system using capacitive rf dielectric heating Vessel sealing system using capacitive rf dielectric heating

A - Human Necessities

61

B

A61B 18/00 (2006.01) A61B 18/04 (2006.01) A61B 18/12 (2006.01) A61B 18/14 (2006.01)

Patent

CA 2498452

An electrosurgical system for sealing vessels using capacitive (RF) dielectric heating and a method thereof are provided. The system includes an electrosurgical instrument having an end effector with parallel plate electrodes that will clamp onto a vessel and maintain a specified gap distance; however, the electrodes will be coated with a non-conductive dielectric material. Such an end effector will ensure that direct conduction between the electrodes does not occur through tissue or fluids and effectively creates a parallel plate capacitor with a dielectric, e.g., tissue and coating, in between the plates. The electrosurgical instrument will be activated with an AC signal at a specified RF frequency, e.g., a Debye resonance frequency, via an electrosurgical generator. An effective AC current will flow through the tissue and cause heating due to fictional losses from rotating polar molecules in the tissue.

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